Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 41, Pages 13195-13202Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201201849
Keywords
biphasic catalysis; copolymerization; desulfurization; oxidation; polyoxometalates
Categories
Funding
- MIUR [20085M27SS]
- Fondazione CARIPARO (Finanziamento Grandi Attrezzature Bando)
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Anchoring terminal octenyl tails on molecular polyoxotungstates yield polymerizable organicinorganic monomers with formula [{CH2?CH(CH2)6Si}xOySiWwOz]4- [x=2, w=11, y=1, z=39 (1); x=2, w=10, y=1, z=36 (2); and x=4, w=9, y=3, z=34 (3)]. These molecular hybrids can use aqueous hydrogen peroxide to catalyze the selective oxidation of organic sulfides in CH3CN. Copolymerization of 13 with methyl methacrylate and ethylene glycol dimethacrylate leads to porous materials with a homogeneous distribution of the functional monomers, as indicated by converging evidence from FTIR spectroscopy and electronic microscopy. The catalytic polymers activate hydrogen peroxide for oxygen transfer, as demonstrated by the quantitative and selective oxidation of methyl p-tolyl sulfide, which was screened as model substrate. The hybrid material containing monomer 2 was also tested in n-octane to evaluate its potential for the oxidation and removal of dibenzothiophene, a well-known gasoline contaminant.
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